Separable fastener slider lock



' shown simply to illustrate Patented Aug. 15,1944

UNITED STATES PATENT OFFICE Y SEPARABLE Easl'rrmaa sLmEn Loox Davis and [anis II. Morin, Bronx, N. Y. Application April 23, 1942, Serial No. 440,448 v cunts.A (ci. z4-zo5.5)

This' invention relates to separable fasteners employing sliders movable along the stringers to couple and uncouple the same. More particu;` larly, the invention relates to a slider having a iiangless side portion permitting free lateral movement cfthe links of one stringer there'- through in providing a jam locking ofthe slider The slider comprises a top wall I0, a bottom wall Il spaced from the top wall by a connecting upon the stringers, when the latter are subjected to lateral stresses or strains tending to separate the stringers. The novel features of the invention will be best understood from the following description when taken together withfthe accompanying drawing,in which certain embodiments vof the invention are disclosed, and in which the separate parts are designated by suitable reference characters in each of the views; and in which:-

Fig. 1 is a plan view of a sectional portion of a fastener illustrating the slider in locked or jammed position thereon. l I

Fig. 2 is a perspective view of the slider detached; and, l

Fig. 3 is a view similar to' Fig. 1 diagrammatically illustrating the slider applied to stringers having straight links. l

in various uses of separable fasteners of the kind under consideration, the stringers are subjected to lateral stresses or strains tending to separate the stringers and to move the;v slider along the stringers and, to check such undesir` able separation, automatic locks of various types and kinds have been employed on the slider structure. These locks represent an added cost to the production of the slider and, furthermore,

are not entirely fool-proof.

It is the purpose of our invention to provide an economical slider structure which will automatisliders not only from the standpoint of the cost the parts, but also from the standoi. producing the lock parts upon the slider point of assembling body.

In Fig. 1 of the accompanying drawing, 5 rep-` resents portions of two stringers, on the vbeaded edges 6 of which are secured links or scoops 'l of the kind having angular oiiset mounting end portions '8 which produce on the resulting fastener what .is termed a herring-bone or chevron effect. This type of stringer construction is one adaptation of the invention.

webv or frog I2 arranged centrally of the wide end portion of the slider. The frog I2 divides the slider into diverging channels I3, I 4 at the wide lend portion of the slider, which channels converge into a single channel I5 at the narrowend portion of the slider.

On the top wall l0 is an elongated bar or other member I8 forming means for coupling a. finger piece or pull I1 therewith.

The walls Il), I I have at their peripheral edges of the channeled side I3 thereof short, inturned anges Il which extend from the narrow end portion a short distance toward the wide end of the slider leaving a large unchanneled opening I3 between the walls at the Wide end portion of the slider. The other side edges of the walls I1), Il have4 inturned llanges 20 extended the full length thereof, as is the usual custom. .In other words, the flanges It are of sufficient length to insure coupling engagement between the links 1 and leaveA large openings IQ to permit free lateral movement of one of the stringers 5 through the side of the slider, as seen in Fig. 1 of the drawing.

When the stringers 5 are subjected to a stress or strain in the direction of the arrows 2l, 22 of Fig. l of the drawing, the left hand stringer,

as .seen in Fig. -l, will extend substantially at right angles to the remainder of such stringer in more or less of a sharp bend; whereas the other stringer assumes a more gradual curve being restricted by the anges 20. This straining of the stringers operates to tilt the slider body sub- 4 stantially in the' manner illustrated in Fig. 1, causing the ends 23 of the flanges I8 to engage one of the links l on the left hand stringer, whereas the ends 24 of the flanges 20 engage one of the links of the other stringer, thus jamming the slider' against further opening movement For purposes of description, the slider may be described as having a fully closed channel side and a partially closed or open channel side, one

stringer being freely movable laterally through the opening in said last mentioned side.

The dei and dash une 2s,.sho'wn in Fig. 1 of the drawings represents the longitudinal axis of l the slider, and with the slider'in the tilted position illustrated, it will appear that the stressed left handrend portion 26 of the stringer extends at an angle less than 90 to the center line of the slider considered with respect to the narrow end portion thereof, whereas thestrained .end portion 21 of the right hand stringer extends at an angle greater than 90 to the slider center as represented by the line 25. Thus it may be said that the slider has a side opening permitting Y lock slider constructed substantially asdescribed is adaptable for use on separable fastener stringers or chains having links or scoops of any de-l sired construction. In` other words the conventional straight link o'f common usage can be employed.

' Fig. 3 of the drawing shows diagrammatically -the slider arrangement upon conventional straight linka, and in .this figure, small portions of stringer tapes 28 are shown with straight links tion of the slider forming a continuous channel longitudinally thereof, the other side portion of the slider having means at the narrow end portion onLv thereof forming a longitudinal channel, and the wide end portion of the second named side of the slider lhaving an opening equal in width .to the spacing of inner surfaces of the slider walls.

4. A slider for separable fasteners having series of fastening links mounted on stringers, of the type having a pair of flared walls having side edge portions, wide end portions and narrow end portions, said walls being joined by a web and having a pair of inturned flanges depending from said walls at each side thereof, said walls, web and flanges defining a pair of converging channels, the improvement which comprises a pair of inturnedv flanges, partly dening one of said channels, depending from said walls at one side thereof and extending throughout the entire length of said channel from the narrow'endto the wide end and terminating in lower edges at the narrow end of the slider and upper edges at the wide end of the slider; a pair of flanges depending from said walls at the other side there- 29 thereon illustrating the engagement of the short flanges 30 of the slider 3i with' the link of one stringer, as at 32, and the engagement `of of, said anges extending from the narrow end of the slider and terminating short of the wide end, said rst andsecond named pairs of flanges cooperating upon lateral spreading of the string- 30 ers toV tilt the slider and lock the same against movement in one direction on the stringers by the longer flanges 33 with the llrk of the stringer,

as at 34. l

Having fully described our invention, what we claim, as new and desire to secure -by Letters Patent, is: f

1. In separable fasteners employing stringers, a slider movable along the stringersI to couple and uncouple the same, said slider comprising a channeled body having diverging channels at one wide end thereoi'lconverging to a single channel at the other narrow end of said body, the stringers having scoops at one edge portion there- 'of movable through thechannels of said slider body in coupling and uncouplingthe stringers, means at one side portion of the slider body reengagement of a lower edge of the iirst named flanges with a fastening link.

5. In a slider for separable' fasteners, front I and back walls, a frog joining said walls at one end portion thereof and forming a pair of dlverging channels between said walls, inturned channel side edge portions on opposite sides of said slider, and the channel edge portion of one side of the slider being shorter than at the opposite side thereof. l

6. In a slider for separable fasteners of the type having a pair .of parallel walls, a frog betaining the sco'ops within the channel portion of said side throughout the full length thereof, the other side of said body having means at the narrow end portion only thereof for retainingthe scoops in the channel of said body, and the remainder of said second named side having an opening permitting free lateral movement of the.

scoops through said side of the slider v:body when the stringers are subjected to a stress or strain j tending to separate the same.

2. In separable fasteners employing stringers, a slider movable along the stringers to couple and uncouple the same, said slider `comprising a channeled body defined by spaced side walls,'one

side edge portion of the walls of said channeled body having inturned ilanges extending throughout the full length thereof, and the other side edge of said walls having inturned flanges extending" only part ofthe length of saidedges forming a large opening permitting free lateral movement of one stringerthrough the second named side edge portion ofthe slider body. N

3. A slider for separable fasteners of the c described, said slider. comprising spaced walls Joined bya frog portion centrally of the wide end portion of said walls, means at one side portween said walls forming diverging channels at one end of said slider and a single channel at the other end, inturned edge portions on said walls forming the outer side of each of said chan-- nels, the inturned edge portions at one side of lthe slider extending substantially theA entire length of the channel, and the inturned edge portions at the other side of the slider extending for only a part of the length of the channel. v'1; -In separable fastenersl employing stringers having scoops adapted to be coupled and uncoupled, a slider movable along the stringers to couple and uncouplelsaid scoops, a slider having front and back wallsya frog joining the walls at one end and forming a pair voi diverging channels between said walls, outer edges of said walls including inturned flanges engaging the scoops of the stringers in coupling and uncoupling said scoops. the inturned flanges or front and back walls at one side of the slider extending the full length of said Walla-and" the inturned anges at the other side of said walls extending 'only part't of the length of said sides to provide, in the remaining part of said side of the slider, an opening for free passage of the scoops of one Stringer therethrough. v l DAVIS MARINSKY.

Louis n. MORIN. E 

